Simultaneous Nadir Overpasses (SNOs) Predictions
Prediction of SNOs between NOAA-21 and LANDSAT-9 Satellite Orbit:
Table of predicted SNOs for the next 14.0 days since TLE Epoch: 11/15/2025
| Index | Date (NOAA-21) | Time (NOAA-21) | Lat,Lon (NOAA-21) | SZA (NOAA-21 ) | Date (LANDSAT-9) | Time (LANDSAT-9) | Lat,Lon (LANDSAT-9) | SZA (LANDSAT-9 ) | Distance(km) | Time Diff (sec) |
| 1 | 11/16/2025 | 23:01:59 | 70.11,-169.18 | 88.98 | 11/16/2025 | 23:02:52 | 70.09,-169.20 | 88.96 | 2.42 | 53 |
| 2 | 11/16/2025 | 23:52:40 | -69.97, -1.65 | 91.15 | 11/16/2025 | 23:52:22 | -69.98, -1.72 | 91.15 | 2.76 | 18 |
| 3 | 11/17/2025 | 00:43:09 | 69.04, 167.00 | 87.93 | 11/17/2025 | 00:42:03 | 69.10, 164.74 | 87.98 | 90.19 | 66 |
| 4 | 11/19/2025 | 14:28:32 | -71.08, 137.69 | 89.42 | 11/19/2025 | 14:29:38 | -70.94, 140.32 | 89.56 | 96.38 | 66 |
| 5 | 11/19/2025 | 15:18:59 | 70.07, -53.37 | 89.58 | 11/19/2025 | 15:19:19 | 70.07, -53.33 | 89.58 | 1.53 | 20 |
| 6 | 11/19/2025 | 16:09:41 | -69.98, 114.09 | 90.51 | 11/19/2025 | 16:08:49 | -69.96, 114.15 | 90.53 | 3.15 | 52 |
| 7 | 11/22/2025 | 06:45:13 | -70.11,-104.98 | 89.81 | 11/22/2025 | 06:46:18 | -70.12,-105.01 | 89.80 | 1.68 | 65 |
| 8 | 11/22/2025 | 07:35:57 | 69.99, 62.50 | 90.09 | 11/22/2025 | 07:35:45 | 70.01, 62.48 | 90.10 | 1.87 | 12 |
| 9 | 11/22/2025 | 08:26:32 | -69.53,-129.49 | 90.38 | 11/22/2025 | 08:25:21 | -69.57,-130.50 | 90.33 | 39.49 | 71 |
| 10 | 11/24/2025 | 23:02:13 | -70.09, 10.80 | 89.28 | 11/24/2025 | 23:02:44 | -70.07, 10.81 | 89.30 | 2.56 | 31 |
| 11 | 11/24/2025 | 23:52:56 | 69.93, 178.35 | 90.57 | 11/24/2025 | 23:52:11 | 69.95, 178.29 | 90.59 | 3.36 | 45 |
| 12 | 11/27/2025 | 14:28:30 | 70.14, -40.84 | 91.28 | 11/27/2025 | 14:29:39 | 70.13, -40.84 | 91.26 | 1.90 | 69 |
| 13 | 11/27/2025 | 15:19:12 | -70.03, 126.64 | 88.84 | 11/27/2025 | 15:19:09 | -70.02, 126.64 | 88.85 | 1.15 | 3 |
| 14 | 11/27/2025 | 16:09:51 | 69.67, -65.50 | 90.81 | 11/27/2025 | 16:08:39 | 69.74, -66.10 | 90.88 | 24.63 | 72 |
Figure of NOAA-21 and LANDSAT-9 satellite orbits during SNOs since TLE Epoch: 11/15/2025
Download SNOs between NOAA-21 and LANDSAT-9 since TLE EPOCH: 11/15/2025 in txt file.
Historial Predications of SNOs between NOAA-21 and LANDSAT-9